Post on 19-May-2020
transcript
The presence and build-up of FAW in a particular
area can be detected by using pheromone traps.
Pheromones are natural compounds that are
emitted by female FAW moths to attract male
moths for mating. Synthetic compounds that
mimic natural FAW pheromones, often referred
to as lures, are placed in traps to attract and
trap male moths. Moths that are caught are then
counted. From these numbers, farmers can know if
FAW is present in their fields and if there is a need
for increased scouting.
Funnel or bucket (unitrap, universal trap) is the
preferred trap for FAW
\ Green lid/yellow funnel/white bucket
\ Male moths are attracted by a pheromone and
caught inside a round bucket
\ High moth catches, sturdy, reusable, can be
deployed for long period
\ Can fill with water; attracts bees, other insects,
spiders and frogs
There may be other
similar home-made
traps from empty
plastic soda bottles.
Traps should be
placed in the field
just after planting and
counting should start after emergence of
the seedling in order to best detect the first arrival
of moths. A suitable location should be selected
for positioning a trap. The selected site should
be inside or on the edge of a maize field, or in an
open area nearby. The trap should be hung from a
suspended pole or branch about 1.5 m above the
ground. One trap should be used for every 0.5–2 ha.
The traps should be checked two times per week by counting the number of FAW moths inside:
1. open the bucket trap by an anti-clockwise
twisting of the low transparent bucket at the
bottom of the trap while holding firmly the
yellow funnel on top;
2. create a clean flat surface and invert the
bucket to pour out the moths onto this surface;
3. remove any non-FAW moths and insects that
may have been caught in the trap;
4. carefully count the number of FAW moths by
putting counted ones to one side;
5. if you are in doubt as to whether the moth is
FAW, then compare with the figure.
FALL ARMYWORM TRAPPING ©FA
O/G
iulio
Nap
olit
ano
FAW GUIDANCE NOTE 3
CONTACT USMORE INFORMATION
Fall-Armyworm@fao.orgFood-chain-crisis@fao.org
www.fao.org/food-chain-crisis/how-we-work/plant-protection/fall-armyworm/
Plant Production and Protection DivisionFood and Agriculture Organization of the United Nations Viale delle Terme di Caracalla, 00153 Rome, Italy E-mail: AGP-Director@fao.org
FAW GUIDANCE NOTE 3
Location: 0°3’51” N / 32°26’49” E
Date checked
FAW confirmed
FAW suspected
Other species
Trap replaced
Lure replaced
Lure name
15/11/2017 2 4 10 n n
18/11/2017 4 0 5 y y
The pheromone lure usually needs to be replaced
every 3–6 weeks to achieve optimum results,
depending on temperature, pheromone components
and release characteristics. This means about five
lures will be required for one trap for a single maize
growing season.
Unopened pheromone dispensers should be stored
within an air-tight bags, tightly sealed glass containers
or foil pouches, preferably inside a refrigerator
or freezer to achieve up to two years shelf life.
Pheromones degrade rapidly if exposed to bright light
or high temperatures. Therefore, dispensers should be
kept inside their sealed packaging until ready to use.
Not all commercially-available lures are the
same. Different companies use different number,
combinations and percentages of the different
identified key components of the FAW pheromone.
This affects the capture of male FAW and other moths,
and therefore makes lure standardization and moth
identification so important.
A trap should never have more than one lure at a
time. To activate the bucket trap, put the lure into
the red rubber septum and then put the septum in
the green colored receptacle. The receptacle is then
plugged into a hole on top of the green cap, which
provides the roof of the bucket trap. The receptacle is
then covered by a white lid. During lure replacement,
the receptacle cap is simply removed and the rubber
septa inserted into it. To activate the delta trap, place
the lure on its side in the centre of the sticky insert
or hang the lure from the top in the centre of the trap
using a lure basket.
Information collected when checking pheromone traps should be carefully recorded, ideally in a mobile app,
so that it can be shared and used for early warning.